Question about Rheem RTG-53PVN Indoor Natural Gas Tankless Water Heater for 1-2 Bathroom H

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Hot and cold water from tankless heater

I installed a Richmond brand tankless water heater and the water runs hot for approx 15mins. and then goes cold. It takes 3-4 mins. for the water to warm up again. The heater is natural gas and we never had a problem with our old tank heater. Could there be something I did wrong on the installation? I followed the directions to the letter and have tried to pinpoint the problem with troubleshooting guide but with no luck.
Thanks for any help
shivering in the shower

Posted by on

  • help_me1997 Apr 04, 2009

    Ours will just turn off completely in the middle of showers and we have to turn it back on. It never turns off while filling the bathtub though. Please help! We've been over the installation instructions and are confident all is correct.

  • Anonymous May 01, 2009

    I installed a Richmond brand tankless water heater and the water runs lukewarm I followed all the instruction and have it set at 140 but by the time it gets to the show its 100. Did not have a problem with my old tanked water heater. Thinking of pulling it all out and going back to the tank. Richmond 74, one bath home
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Check your tigh/low water temperture setting. you may have them crossed.
check all of your wiring.

Posted on Jan 13, 2009

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1 Answer

Richmond encore 3kw electric water heater stuck on standby mode no hot water this is a brand new unit never used!


About the only DIY repairs available are on following link:
http://waterheatertimer.org/How-to-wire-Tankless-electric-water-heater.html

Richmond is made by Rheem. They may tell you to call installer. Or give you name of local repair technician.

Gene


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I keep getting a code 13 and no hot water after about 3 min. Vent is clear??


Undersized gas line?
Temperature set too high?
Haven't kept up with regular maintenance?
Tankless older than 5 years?
Hard water over 7 grains?
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

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Display is flashing "14"


Rheem, Richmond, Paloma tankless computer?
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

Add a comment and describe product in detail, with approx age, brand, type of heater, and what you have done so far to keep the unit maintained as shown in product manual.

Gene
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Our tankless hot water heater runs cold sometimes.


Check for crossover: Where bad faucet cartridge or check valve lets cold enter hot pipe so hot never arrives at tap.
http://waterheatertimer.org/Crossover.html
If problem is not plumbing, then add a comment and describe which water heater you have, including approx age and what has been done so far.
Call local plumber to fix tank-type heater
If you have tankless, call manufacturer to get list of local technicians who work on these computers that heat water, or save money and tear it off wall and install tank-type heater today.
http://waterheatertimer.org/How-to-install-gas-water-heater.html
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Service manual for RGVH


1) What kind of heater is it? Brand, type, approx age?
If it's a rheem-richmond-ruud-ecosense there are no service manuals:

2) Electric tank:
http://waterheatertimer.org/How-to-troubleshoot-electric-problems-with-water-heater.html

3) Gas tank:
http://waterheatertimer.org/How-to-troubleshoot-gas-water-heater.html#intellivent

4) Rheem Tankless gas. Sell it on ebay, and install gas tank for $385.
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html
http://waterheatertimer.org/How-to-install-gas-water-heater.html

5) Tankless electric: I have no resources.
6) Bosch tankless: go to their site and each model has troubleshoot resources.
7) Other brands tankless: I have no resources on hand.
8) Solar, boiler, hybrid, etc: I have no resources on hand. Search google with exact model and brand followed by .pdf to generate possible results.

9) Call manufacturer.

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RichmondG40PVpower vent gas water heater


1) Type and brand water heater unknown.
Copy following link for Rheem-Richmond tankless error codes:
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

2) Question posted under Richmond tank-type power vent.
Error code 24 appears to be Rheem-Richmond tankless water heater.

3) Add a comment with more information about type, brand, age of water heater including what you have tried so far.

4) Call service technician to catch up on required yearly maintenance.

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1 Answer

I have a new Richmond tankless. Every time someone turns on the water for a second the water heater comes on for a second. Is this ******* the unit ? I tell people to just use the cold water tap if th


Before calling service technician, copy following link for troubleshoot resources:
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

If tankless comes on when HOT tap is turned on, then that is normal.
If tankless comes on when cold is turned on, then you might have crossover:
http://waterheatertimer.org/Crossover.html
If tankless comes on when single handled faucet is lifted in center, then that draws water from hot pipe and will activate tankless > so don't install single handled faucets to save water heater energy, regardless what type water heater you have.

Tankless require monthy-to-yearly maintenance to avoid common error codes. The product manual recommends yearly service. Since Rheem does not post service manuals, you generally have to pay somebody to take apart and test the unit. The cost of this far outstrips expected savings from owning expensive water heater that requires lots of maintenance, yet is heavily promoted as the solution to water heater problems.

Never install tankless water heater is best way to avoid complications of expensive water heater that is maintenance heavy, hard to diagnose, expensive to fix, etc.
Never expose tankless to more than 11 grains hard water.
http://waterheatertimer.org/pdf/Rheem-CondensingTankless-maintenance-2012.pdf

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I have a recently installed richmond water heater. When the shower is running and someone turns the faucet on in the kitchen the water gets drastically colder in the shower. We didnt have that problem with...


Which type Richmond water heater?
Is this a tankless water heater or tank-type?

Tankless are notorious for 'cold water sandwich' under exact conditions you describe. You might need tankless with larger BTU burner.
Don't install a tankless.
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

If you have tank-type water heater, then I suspect a clog in the hot water line, or single-handle faucet cartridge in show is going bad.
Same problems can contribute to tankless problems.
http://waterheatertimer.org/Low-hot-water-pressure.html

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LP pressure needed is no less than 11 inches of water column while all gas appliances are in operation. Info is in the installation manual near checking CO2 levels.

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